阅读说明：本技术 一种控制翼子板r棱线光顺性的工艺方法 (Process method for controlling smoothness of R-shaped ridge of fender ) 是由 罗曦 郭晓东 张军 王强 陈文峰 张鑫 邵翠红 张永亮 任伟 崔爱豹 于 2020-07-08 设计创作，主要内容包括：本发明公开了一种控制翼子板R棱线光顺性的工艺方法,翼子板与侧围搭接区域冲压包括以下工序：第一工序,拉延；第二工序,修边；第三工序,斜翻边：翻边时利用填充斜楔压料板夹料翻边,控制走料,消除之间表面缺陷,在理论上消除了出现棱线R不光顺的可能。模具工作,上模运动,填充斜楔翻边凸模和填充斜楔压料板到位,压料板压料,斜翻边凹模开始工作,在整个翻边过程中翻边凹模始终与填充斜楔压料板夹着板料工作,直至翻边完成。本发明既能保证制件在生产过程中的成形质量,降低拉延成形产生滑移线的风险,解决R不光顺等表面缺陷。(The invention discloses a process method for controlling the smoothness of an R ridge line of a fender, wherein the stamping of a lap joint area of the fender and a side wall comprises the following working procedures: a first step of drawing; a second step of trimming; a third procedure, obliquely flanging: during flanging, the material is clamped and flanged by using the filling wedge material pressing plate, the material feeding is controlled, the surface defects between the material pressing plate and the material pressing plate are eliminated, and the possibility of generating the non-smooth edge line R is theoretically eliminated. The mould work, go up the mould motion, pack slide wedge turn-ups terrace die and pack slide wedge pressure flitch and target in place, the pressure flitch is pressed the material, and oblique turn-ups die begins work, and the turn-ups die is pressed the flitch with packing slide wedge and is pressed the flitch and is pressed from both sides sheet material work all the time at whole turn-ups in-process, and the turn-ups is accomplished until the turn-ups. The invention can ensure the forming quality of the workpiece in the production process, reduce the risk of generating slip lines by drawing and forming and solve the surface defects of irregular R and the like.)

1. The process method for controlling the smoothness of the R ridge line of the fender is characterized in that the stamping of the lap joint area of the fender and a side wall comprises the following steps:

a first step of drawing;

a second step of trimming;

a third procedure, obliquely flanging: the material feeding is controlled through material clamping and flanging in the flanging process.

2. The process method for controlling R-ray smoothness of a fender according to claim 1, wherein in the third process, the material is clamped and flanged by a filling wedge material pressing plate during flanging, so that the material feeding is controlled.

3. The process method for controlling the R-ray smoothness of the fender according to claim 2, wherein the flanging die used in the third process comprises a filling wedge flanging male die, a flanging female die, a material pressing plate, a filling wedge material pressing plate and a male die; the male die and the pressure plate are respectively positioned at two ends of a workpiece, the flanging female die and the filling wedge pressure plate are respectively positioned at two ends of a position, to be flanged, of the workpiece, and the filling wedge flanging male die is positioned between the male die and the filling wedge pressure plate.

4. The process method for controlling the R-edge smoothness of the fender according to claim 3, wherein the third process material clamping and flanging process comprises the following steps: the mould work, go up the mould motion, pack slide wedge turn-ups terrace die and pack slide wedge pressure flitch and target in place, the pressure flitch is pressed the material, and oblique turn-ups die begins work, and the turn-ups die is pressed the flitch with packing slide wedge and is pressed the flitch and is pressed from both sides sheet material work all the time at whole turn-ups in-process, and the turn-ups is accomplished until the turn-ups.

5. A process for controlling R-ridge smoothness of a fender as in claim 3 wherein said third step uses a flanging die further comprising a drive wedge for driving a fill wedge flanging punch.

6. The process of claim 1, wherein the R-ridge forming is not completed in the first step.

Technical Field

The invention relates to a process method for controlling the smoothness of an R-shaped ridge line of a fender, which can ensure the forming quality of a workpiece in the production process, reduce the risk of slip lines generated by drawing and forming and solve the surface defects of unsmooth R and the like.

Background

In the automobile outer covering, the fender is one of key parts in the automobile body outer covering, the shape surface structure of the fender is a more complex part in the automobile outer covering, the part is positioned at the most important position of the automobile appearance, the requirements on the surface quality and the dimensional precision are extremely high, the matching relation of the fender is very complex, and the fender has strict matching relation with main parts such as side walls, doors, engine hoods, lamps, bumpers and the like. In summary, in order to realize the design intention of the product shape, research must be carried out on the forming process, the forming characteristics of the fender are realized, and the forming quality and the dimensional accuracy of the product in the forming process of each working procedure of the stamping die are ensured.

In the forming process of the fender, the problem of unsmooth R surface quality defects often appears on ridge lines R due to complex modeling and difficult realization of surface product precision in a lap joint area of the fender and a side wall, and under the conventional condition, debugging means such as the later debugging bench worker optimizing the front-back turn-ups cutter connecting range and the like try to solve the problem, the method seriously depends on the operating skill of the bench worker, the optimizing period is too long, the surface defect cannot be guaranteed to be thoroughly eliminated, the visible effect of the area is influenced by the defect, and the attractiveness of the whole vehicle is reduced. The invention provides an effective method for researching the size of the moon-curved area of the fender part and the principle of generation of the surface quality problem.

A flanging edge line R of an overlapping area of the fender and the side wall often generates a slip line which is difficult to eliminate in a drawing process, and the surface quality defect of unsmooth R often appears in the subsequent flanging. The existing scheme is tried to solve by debugging means such as later-stage debugging bench worker optimization, the method seriously depends on the operating skill of bench workers, the optimization period is too long, and the defect cannot be guaranteed to be thoroughly eliminated, and the area of the fender is in lap joint with the side wall and belongs to a first-level visible area, so that the defect can influence the visible effect of the area and reduce the attractiveness of the whole vehicle.

Patent document 1 discloses a method of forming a fender panel including an ear plate, a first plate connected to the ear plate, and a second plate connected to the first plate; the molding method comprises the following steps: s1, forming the joint of the ear plate and the first plate in a contact manner; and S2, pressing the ear plate and the first plate which are formed in contact in the step S1 with the second plate. According to the forming method of the fender disclosed by the invention, the connecting part of the lug plate and the first plate is firstly formed in a contact manner, and then the lug plate, the first plate and the second plate are integrally formed in a pressing manner, so that the smooth edge line of the connecting part of the first plate and the second plate can be effectively ensured, the quality of the edge line of the connecting part is improved, and the appearance of the fender is attractive.

Patent document 2 discloses a fender turn-ups plastic mould, including last mould and lower mould, be equipped with the terrace die on the lower mould, go up inside main material core and the plastic terrace die of being equipped with of mould, go up the inside supplementary swager structure that still is equipped with of mould, the terrace die includes main supporting part, plastic die and assists the supporting part, main supporting part with main material core relative setting of pressing, the plastic die with the plastic terrace die is to setting up, assist the supporting part with assist the relative setting of swager structure. The invention can fully form the lapping position of the outer plate of the automobile fender and the front bumper, improve the rigidity of the flanging position and effectively solve the problem of resilience of the flanging and shaping position.

Patent document 3 discloses a side pressing mechanism of a flanging and shaping die of an automobile fender, which comprises a lower die body, wherein a male die is arranged on one side of the lower die body, a groove is formed in the lower die body, an upper die body is arranged in the groove, a wedge body is arranged on one side of the upper die body, a side pressing plate is arranged at one end of the wedge body, the side pressing plate is fixedly connected with the wedge body through a wedge clamping plate, the male die is arranged at the bottom of the side pressing plate, and a working knife block is arranged between the male die and the wedge body; this car side swager of vapour vehicle covering fender turn-ups sizing die constructs can guarantee the shaping quality, has optimized the production of mould and plate.

Disclosure of Invention

The invention relates to a process method for controlling the smoothness of an R edge line of a fender, which solves the quality defect of the poor smoothness of the R edge line of the moon-curved area of the fender caused by the modeling of two layers of steps of a product by a flanging mode of controlling the feeding state of a plate material through material clamping. The invention can ensure the forming quality of the workpiece in the production process, reduce the risk of generating slip lines by drawing and forming and solve the surface defects of irregular R and the like.

The purpose of the invention is realized by the following technical scheme:

a process method for controlling the smoothness of an R ridge line of a fender comprises the following steps of:

a first step of drawing;

a second step of trimming;

a third procedure, obliquely flanging: the feeding is controlled by the material clamping and flanging, and the possibility of the occurrence of the unsmooth ridge line R is theoretically eliminated.

And further, in the third process, the filling wedge pressing plate is used for clamping and flanging during flanging, so that the feeding is controlled, and the surface defects between the filling wedge pressing plate and the flanging are eliminated.

Further, the flanging die used in the third process comprises a filling wedge flanging male die, a flanging female die, a pressure plate, a filling wedge pressure plate and a male die; the male die and the pressure plate are respectively positioned at two ends of a workpiece, the flanging female die and the filling wedge pressure plate are respectively positioned at two ends of a position, to be flanged, of the workpiece, and the filling wedge flanging male die is positioned between the male die and the filling wedge pressure plate.

Furthermore, the third process material clamping and flanging process comprises the following steps: the mould work, go up the mould motion, pack slide wedge turn-ups terrace die and pack slide wedge pressure flitch and target in place, the pressure flitch is pressed the material, and oblique turn-ups die begins work, and the turn-ups die is pressed the flitch with packing slide wedge and is pressed the flitch and is pressed from both sides sheet material work all the time at whole turn-ups in-process, and the turn-ups is accomplished until the turn-ups.

Furthermore, the flanging die used in the third procedure further comprises a driving wedge, and the driving wedge is used for driving the filling wedge flanging male die.

Further, since the R ridge line is not formed in the first step, an irreparable slip line is not caused.

The invention has the following beneficial effects:

the invention provides a process method for controlling the smoothness of an R edge line of a fender, which solves the quality problem of the poor smoothness of the R edge line of a moon-curved area of the fender caused by the modeling of two layers of steps of a product in a material clamping and flanging mode, can ensure the forming quality of a workpiece in the production process, reduce the risk of generating a slip line during drawing forming, solve the surface defects of poor smoothness of the R and the like, and provide a simple and effective problem solution for the later-stage workpiece finishing.

Since the R ridge line formation is not completed in the first step, an irreparable slip line is not caused.

In the third process, the feeding is controlled through the material clamping and flanging, and the possibility of non-smooth ridge R is eliminated theoretically. Through the analysis and research of the forming principle of the R edge line of the moon-curved area of the fender part, the quality defect that the R edge line is not smooth is caused because the feeding state of the plate is a free state during flanging. The problem of non-smooth R edge lines caused by the modeling of two layers of steps of a product can be solved by adopting a process method for controlling the feeding state of the plate. The debugging period of the die is shortened, and the technical capability requirement of debugging bench workers is lowered.

The invention provides a solution for the finishing process of the fender part, and can replace the manual optimization work of a bench worker in the later debugging period by the optimization of the earlier-stage process method, thereby shortening the finishing period.

According to the traditional fender forming process, the two-layer platform in the moon-curved area of the fender is cancelled and changed into a flanging structure in one surface at the Stamping SE (Stamping synchronous engineering) stage, but the modeling effect of the whole vehicle is changed. The invention solves the problem that the R ridge line of the moon-curved area of the fender is not smooth through a technological means, and ensures the modeling effect of the whole vehicle.

The invention solves the problem of slip lines caused by the formation of R ridge lines at the moon corner of a fender in the first drawing process in the traditional process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic view of the lap joint area of a fender and a side panel;

FIG. 2 is a schematic sectional view of a mold in a wedge flanging process;

FIG. 3 is a schematic view of the shape of the lap joint area of a conventional fender and a side panel;

FIG. 4 is a schematic view of a third process flanging die in a traditional fender and side wall lap joint area;

FIG. 5 is a schematic view of the formation of the lap-joint area of the rear fender and the side panel by the method of the present invention;

FIG. 6 is a schematic view of a third process flanging die for a lap joint area of a fender and a side wall of the invention;

FIG. 7 is a schematic view of a third process flanging die for a lap joint area of a fender and a side wall of the invention;

FIG. 8 is a schematic view of a third process flanging die for the lap joint area of the fender and the side panel according to the invention;

in the figure:

1-filling a wedge flanging male die; 2-flanging a female die; 3-pressing a material plate; 4-filling a wedge pressing plate; 5-a male die; 6-driving the wedge; 7-wedge working slide block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

A process method for controlling the smoothness of an R ridge line of a fender comprises the following steps of:

a first step of drawing;

a second step of trimming;

a third procedure, obliquely flanging: the feeding is controlled by the material clamping and flanging, and the possibility of the occurrence of the unsmooth ridge line R is theoretically eliminated.

And further, in the third process, the filling wedge pressing plate is used for clamping and flanging during flanging, so that the feeding is controlled, and the surface defects between the filling wedge pressing plate and the flanging are eliminated.

Further, the flanging die used in the third process comprises a filling wedge flanging male die 1, a flanging female die 2, a pressure plate 3, a filling wedge pressure plate 4 and a male die 5; the male die 5 and the pressure plate 3 are respectively positioned at two ends of a workpiece, the flanging female die 2 and the filling wedge pressure plate 4 are respectively positioned at two ends of a position of the workpiece to be flanged, and the filling wedge flanging male die 1 is positioned between the male die 5 and the filling wedge pressure plate 4.

Furthermore, the third process material clamping and flanging process comprises the following steps: the mould work, go up the mould motion, pack slide wedge turn-ups terrace die 1 and pack slide wedge pressure flitch 4 and target in place, press flitch 3 to press the material, oblique turn-ups die 2 begins work, and turn-ups die 2 presss from both sides the sheet material work with packing slide wedge pressure flitch 4 all the time at whole turn-ups in-process, until the turn-ups is accomplished.

Furthermore, the flanging die used in the third process further comprises a driving wedge 6, and the driving wedge is used for driving the filling wedge flanging male die 1.

Further, since the R ridge line is not formed in the first step, an irreparable slip line is not caused.

Examples

The invention relates to a process method for controlling the smoothness of an R edge line of a fender, which solves the quality problem of the poor smoothness of the R edge line of the moon-curved area of the fender caused by the modeling of two layers of steps of a product in a material clamping and flanging mode. The invention can ensure the forming quality of the finished piece in the production process, reduce the risk of generating a slip line in drawing and forming, solve the surface defects of irregular R and the like, and provide a simple and effective problem solution for the later-stage finished piece rectification.

As shown in fig. 1, a moon-curved area (an overlapping area between the fender and the side wall) of the fender is overlapped with the side wall, and the area is a first-level visible area of the whole vehicle, so that the requirement on the surface quality of the area of the fender is severe. According to the modeling characteristics, products in the area need to be finished by different processes: a first step of drawing; a second step of trimming; and the third step is obliquely flanging.

According to design experience and comparison software simulation results, the problem of the surface quality of the area occurs after the first process or the third process is completed, and the problem continues until the whole workpiece is punched. According to the traditional process method, two forming modes are provided for the edge line R of the lap joint area of the fender and the side wall: 1. in the first drawing step, the method can cause difficult-to-eliminate slip lines; 2. this results in a non-smooth R-ridge after the third step. This regional molding characteristics has decided that the R crest line of this position is not pure turn-ups, and this has just caused the turn-ups die can't touch the material earlier in R crest line department, leads to turn-ups crest line R to extrude, and then the surface defect that R is out of order appears, even later stage is optimized through means such as adjustment turn-ups clearance by the mould pincers worker, this defect still can't thoroughly be eliminated.

Through the analysis of the reason for forming the surface defect of the R edge line of the fender, the main reason for causing the defect is that the flanging female die cannot touch materials at the R edge line due to the existence of the second-layer platform shape in the area, so that the defect can be eliminated by optimizing the flanging mode of the third process. The detailed scheme is as follows: in the third process, the feeding is controlled through the material clamping and flanging, and the possibility of non-smooth ridge R is eliminated theoretically.

The method for controlling the surface quality of the R ridge line of the moon camber of the fender modifies the flanging mode of the third process, and ensures that the filling wedge material pressing plate can be used for controlling material feeding and eliminating surface defects during flanging.

In the traditional flanging process, a flanging die in a third process is shown in fig. 4, the die works, an upper die moves, a filling wedge flanging male die is in place, an upper pressure plate presses materials, a flanging female die starts to work, flanging starts, and then an upper die flanging insert enters from a tool receiving point to complete flanging together. In the flanging process, the workpiece is in a free state, and the flanging process cannot be controlled.

The invention improves the flanging mode of the third procedure, and the flanging die used in the third procedure comprises a filling wedge flanging male die 1, a flanging female die 2, a pressure plate 3, a filling wedge pressure plate 4 and a male die 5; the male die 5 and the pressure plate 3 are respectively positioned at two ends of a workpiece, the flanging female die 2 and the filling wedge pressure plate 4 are respectively positioned at two ends of a position of the workpiece to be flanged, and the filling wedge flanging male die 1 is positioned between the male die 5 and the filling wedge pressure plate 4.

The flanging principle of the third process of the invention is shown in fig. 6 to 8: the mould works, the upper mould moves, and the filling wedge flanging male mould 1 and the filling wedge pressure plate 4 are positioned (as shown in figure 6); the material pressing plate 3 presses materials, and the inclined flanging female die 2 starts to work (as shown in fig. 7); in the whole flanging process, the flanging female die 2 and the filling wedge pressure plate 4 clamp the plate material to work all the time until the flanging is finished (as shown in fig. 8). Compared with the traditional process, the invention controls the feeding through the material clamping and flanging, and theoretically eliminates the possibility of the occurrence of the unsmooth ridge line R.

The invention has the technical effects that:

the technical scheme is that the quality problem that an R ridge line of a moon-curved area of a fender is not smooth due to modeling of two layers of steps of a product is solved by a mode of material clamping and flanging. The invention can ensure the forming quality of the finished piece in the production process, reduce the risk of generating a slip line in drawing and forming, solve the surface defects of irregular R and the like, and provide a simple and effective problem solution for the later-stage finished piece rectification.

Since the R ridge line formation is not completed in the first step, an irreparable slip line is not caused.

In the third process, the feeding is controlled through the material clamping and flanging, and the possibility of non-smooth ridge R is eliminated theoretically.

The invention provides a solution for the finishing process of the fender part, and can replace the manual optimization work of a bench worker in the later debugging period by the optimization of the earlier-stage process method, thereby shortening the finishing period.

Control of surface defects of fender moon curve R ridge is obtained by the method of any one of claims 1 to 5.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.